How do I get the subject of failed items?

Answer:

MigrationWiz is used by the most secure organizations in​cluding healthcare, government and banking institutions. In order to comply with privacy policies and securi​ty regulations, we do not store any item subject by default. You can have us store and report the subject of failed items using an opt-in option if you wish.

If some items failed to migrate but you did not ena​ble subject logging prior to the migration, nothing will be logged. Therefore, you may want to retry failed items after enabling this option. Failed items will be reprocessed and we will log their subject and folder path (if available).

To enable subject logging of failed items for all mailboxes under a Project:

If a mailbox is already running when you enable this option, you must restart the migration for the change to take effect. You may also need to retry failed items for subjects to be logged.

In many cases, we are unable to read the subject of a failed item. For example, if the item is corrupt, was deleted during migration, or because the item is very large (i.e., the connection timed out before the item could be read). To help identify offending items, mailbox statistics include a count of failed items per folder as well as an aggregate error size. A large error size typically indicates that some large items could not be transmitted due to size limits at the Source or Destination.

I had the same question... "Once the logging for failed item subjects is enabled, as described above, how do migration administrators access that log?" The answer is go to the list of projects in MigrationWiz, between the edit and delete icons for the project is an icon that says "Send Project Statistics by Email". Click that one, they send several zipped csv's, the ItemErrors.csv is the file of interest.